Search results for: '2023 dark age mark'

An extinct early ground squirrel jaw (Ischyromys sp.) from Sioux Co., Nebraska. Ischyromys was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed. This item comes with a 2"x 2" floating frame display.

WR16        Size: 1"  

Name: Ischyromys sp. 

Age:  Oligocene

Location: Sioux Co., Nebraska

Note - Posting 49 Oligocene Mammal fossils in January 2025.      Link to Oligocene Mammal Fossils

An extinct early ground squirrel jaw (Ischyromys sp.) from Sioux Co., Nebraska. Ischyromys was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed. This item comes with a 2"x 2" floating frame display.

WR15        Size: 13/16"  

Name: Ischyromys sp. 

Age:  Oligocene

Location: Sioux Co., Nebraska

Note - Posting 49 Oligocene Mammal fossils in January 2025.      Link to Oligocene Mammal Fossils

An extinct early ground squirrel jaw (Ischyromys sp.) from Sioux Co., Nebraska. Ischyromys was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed. This item comes with a 2"x 2" floating frame display.

WR14        Size: 7/8"  

Name: Ischyromys sp. 

Age:  Oligocene

Location: Sioux Co., Nebraska

Note - Posting 49 Oligocene Mammal fossils in January 2025.      Link to Oligocene Mammal Fossils

An extinct early ground squirrel jaw (Ischyromys sp.) from Sioux Co., Nebraska. Ischyromys was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed. This item comes with a 2"x 2" floating frame display.

WR13        Size: 3/4"  

Name: Ischyromys sp. 

Age:  Oligocene

Location: Sioux Co., Nebraska

Note - Posting 49 Oligocene Mammal fossils in January 2025.      Link to Oligocene Mammal Fossils

An extinct early ground squirrel jaw (Ischyromys sp.) from Sioux Co., Nebraska. Ischyromys was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed. This item comes with a 2"x 2" floating frame display.

WR12        Size: 1"  

Name: Ischyromys sp. 

Age:  Oligocene

Location: Sioux Co., Nebraska

Note - Posting 49 Oligocene Mammal fossils in January 2025.      Link to Oligocene Mammal Fossils

An extinct early Dog-like Canid jaw (Hesperocyon gregarius) from Sioux Co., Nebraska. Hesperocyon gregarius was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed. This item comes witha 2"x 2" floating frame display.

WR45        Size: 1"  

Name: Hesperocyon gregarius

Age:  Oligocene

Location: Sioux Co., Nebraska

Note - Posting 49 Oligocene Mammal fossils in January 2025.      Link to Oligocene Mammal Fossils

An ultra rare group of two associated TOP QUALITY Araucaria mirabilis pine cones from Argentina. A May Fossil of the Month. These cones were found side by side and remain on their original natural matrix. The Jurassic pine cones are exquisite and known for their highy quality and extreme preservation. This cone is large and shows great exterior detail. Rare short stem sections are present. An incredible pair of associated natural pine cones. No repair or restoration. Authenticity guaranteed. Note - new Argentine pine cone specimen export has stopped for more than 10 years! These cones come from an old collection. Specmen sits nicely on its flat base and makes a fantastic display piece!  Note - this specimen weighs 1.75 lbs. and will require supplemental postage for international customers. 

 X301       Size: 2-5/8" x 2-1/8"   &   2-1/8" x 2-1/8"

Note - Adding 7 rare Argentine pine cone specimens in May 2023.      Link to Pine Cone fossils.

A High Quality Notorhynchus tooth - a Sevengill Cow shark, from the Pumunkey River, Virginia.  A lower jaw tooth with 7 primary cusps. This tooth has an excellent brown color with a brown root. Great color and preservation. This is a Miocene age, Calvert Formation tooth. An excellent collector's tooth. Authenticity guaranteed. 

VA80         Size: 1-1/16"

Note adding 11 Virginia Cow shark teeth in June 2022.  --> Link to Virginia Cow Shark teeth

A Top Quality Notorhynchus tooth - a Sevengill Cow shark, from the Potomac River, Virginia.  A lower jaw tooth with 7 primary cusps. This tooth has a blue-gray color with a tan root. Incredible color and preservation. This is a Miocene age, Calvert Formation tooth. An excellent collector's tooth. Authenticity guaranteed. 

VA71         Size: 1-1/8"

Note adding 11 Virginia Cow shark teeth in June 2022.  --> Link to Virginia Cow Shark teeth

A Top Quality Notorhynchus tooth - a Sevengill Cow shark, from the Randle's Cliff, Maryland.  An upper jaw parasymphyseal tooth with 1 primary cusp. This tooth has an excellent blue - gray color with a tan root. Great color and preservation. This is an early Miocene age, Calvert Formation tooth. An excellent collector's tooth. Authenticity guaranteed. 

MD422         Size: 13/16"

Note adding 23 Maryland Cow shark teeth in June 2022.  --> Link to Maryland Cow Shark teeth

A Top Quality Notorhynchus tooth - a Sevengill Cow shark, from the Randle's Cliff, Maryland.  An upper jaw tooth with 2 primary cusps. This tooth has an excellent blue - gray color with a tan root. Great color and preservation. This is an early Miocene age, Calvert Formation tooth. An excellent collector's tooth. Authenticity guaranteed. 

MD421         Size: 11/16"

Note adding 23 Maryland Cow shark teeth in June 2022.  --> Link to Maryland Cow Shark teeth

A Top Quality Notorhynchus tooth - a Sevengill Cow shark, from the Randle's Cliff, Maryland.  An upper jaw tooth with 3 primary cusps. This tooth has an excellent blue - gray color with a tan root. Great color and preservation. This is an early Miocene age, Calvert Formation tooth. An excellent collector's tooth. Authenticity guaranteed. 

MD420         Size: 5/8"

Note adding 23 Maryland Cow shark teeth in June 2022.  --> Link to Maryland Cow Shark teeth